Valve

1. Overview of Gate Valve Structure Gate valves are widely used in industrial sectors such as petrochemicals, power stations, long-distance pipelines, and marine applications. They control the flow of media by moving a gate (wedge or parallel plate) between the valve seats to open or close the passage. A typical gate valve is composed of […]

1. Function of Fusible PlugsFusible plugs are temperature-sensitive safety components made from low-melting-point alloys. When ambient temperature exceeds a predefined threshold (typically 70–200°C), the plug melts and triggers the emergency shut-off valve (ESV) to close automatically. This serves to: Prevent hazardous media leaks during fire or extreme heat; Protect equipment from thermal damage or explosion;

1. Why Are Large Globe Valves Difficult to Operate? For globe valves with diameters of DN200 and above, manual operation becomes significantly more difficult due to increased resistance. The average horizontal torque an adult can apply is approximately 60–90 kg, depending on physical strength. Standard globe valves are designed for flow direction from low to

In industrial process automation, control valves are among the most important final control elements. Valve positioners—especially smart electro-pneumatic types—play a vital role in improving control accuracy, response speed, and system efficiency. Smart valve positioners can be classified by their I/P converter mechanisms into two main types: nozzle-flapper and piezoelectric valve. Leading global manufacturers use different

Ball valves are widely used in industrial pipelines for fluid control. Among them, C-type, O-type, and V-type ball valves are three common types, each with distinct structural designs, sealing mechanisms, and application suitability. This article outlines their key differences to assist in proper selection and usage. I. Structural Design and Working Principle 🔹 1. C-Type

Globe valves are commonly used in industrial pipelines for fluid control, especially where precise throttling or frequent operation is needed. One frequently asked question is whether the flow direction of a globe valve must always follow the “low in, high out” principle. While “low in, high out” is the standard design in most installations, it

1. Pre-Installation Preparation • Component Inspection Before installation, inspect each valve in the manifold carefully. Ensure that all valves operate smoothly, without sticking or leakage. Also, check the pressure impulse lines, pipe fittings, and other connectors for any damage and confirm that the dimensions are compatible. • Cleaning Clean the installation site and connection interfaces

Globe valves and gate valves are two of the most common valve types used in industrial applications. While they may appear similar in some contexts, their internal structures, functions, and application scenarios are significantly different. This article outlines their differences in detail from multiple dimensions to help engineers and users make informed choices. 1. Operating

1. Risks and Principles of Small Opening Operation Control valves operating at small openings often encounter critical issues due to dramatic changes in internal fluid dynamics. Key problems include: 1.1 Severe Throttling Erosion When the valve throttling gap is extremely narrow, fluid velocity surges. This high-speed flow erodes the plug and seat surfaces intensely—particularly in

In industrial pipeline systems—especially within chemical plants—selecting the right type of valve is critical to ensuring process safety, efficiency, and maintainability. Among the most commonly used are gate valves and globe valves, each with distinct structural features, sealing mechanisms, and application scenarios. This article provides an in-depth comparison to assist engineers, procurement professionals, and operators